34results about How to "The preparation process is simple and diverse" patented technology

The invention discloses a soluble functional polyimide based on fluorene a structure as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out a reaction on fluorene-containing aromatic diamine having a non-plane large conjugation structure and various tetracid dianhydride so as to obtain a polyimide solution; and carrying out imidization so as to obtain the soluble polyimide material. The soluble polyimide material has good solubility, can be dissolved in conventional organic solvents such as NMP(N-methyl-2-pyrrolidone),DMSO(dimethylsulfoxide),DMAc(dimethylacetylamide), DMF(dimethyl formamide), m-Cresol, THF(tetrahydrofuran) and like and has high properties such as glass-transition temperature, thermal stability, photoluminescence and the like. The synthesis method has simple process and diversity, thus the method is suitable for industrial production; the polyimide disclosed by the invention can be applied to preparation of photoluminescence products, can be widely applied to high and new technology industry fields such as electron, microelectron, information, luminescent materials, aerospace and the like.

The invention discloses a soluble functional polyimide with a carbazole structure and a preparation method and an application thereof. Polyimide materials use an aromatic diamine with a carbazole structure and a large conjugate structure and various tetracid dianhydrides as raw materials, and polyimide materials are prepared through thermal imidization or chemical imidization. As diamine monomers are provided with large non-planar conjugate structures, so that the polyimide is soluble in conventional organic solvents, and is provided with performances of high glass-transition temperature, thermal stability, photoluminescence, electrochromism, low dielectric constant and the like. The synthesis method is simple in process and diversified, and applicable to industrial production. The polyimide can be widely applied in the new and high technology industry field of electronics, microelectronics, information, luminous materials, aerospace and the like.

The invention discloses a polyimide nanometer composite with a carbazole structure and a preparation method and application thereof. High-planarity aromatic diamine with the carbazole structure, various types of tetracarboxylic dianhydride and layered nanometer particles are adopted as the raw materials for the composite. In the argon atmosphere, layered nanometer particles are dispersed in strong-polarity non-proton organic solvent, diamine and dianhydride are then added to dispersing liquid, and a polyamide acid composite adhesive solution is obtained after the mixture is stirred and reacts; or, the layered nanometer particles are dispersed, a polyamide acid adhesive solution is prepared from diamine and dianhydride in another container, and then a composite adhesive solution is prepared by mixing the nanometer particle dispersing liquid with the polyamide acid adhesive solution; finally, the polyimide nanometer composite is obtained by dehydrating polyamide acid. Molecule chains of polyimide have good planarity and rigidity; the composite prepared from polyimide and the layered nanometer particles through compositing has excellent thermal stability and isolation performance and can be widely applied to the fields of high-isolation packaging, device packaging and the like.

The invention discloses polyimide containing a carbazole structure, a preparation method thereof and application thereof. According to the polyimide, carbazole structure included aromatic diamines high in planarity and various tetracid dihydride are used as raw materials to prepare polyimide powder materials or film through thermal imidization or chemical imidization. The lowest energy state structure of diamine monomers have high planarity and rigidity, the prepared polyimide molecular chain is stacked tightly and has outstanding blocking performance, high glass-transition temperature and heat stability as well as low thermal expansion coefficient. The polyimide preparation method is simple and diversified in process and applicable to industrial production. The polyimide can be widely applied to the field of high and new technology industries such as microelectronics, war industry, aerospace, high-performance packaging and protection and electronic device packaging.

The invention discloses a polyimide nanocomposite of a naphthalene structure and a preparation method and application of the polyimide nanocomposite. According to the composite, aromatic-diamine which has high planarity and of the naphthalene structure, various types of tetracarboxylic dianhydride and layered nanoparticles are adopted as raw materials; in the argon atmosphere, the layered nanoparticles are dispersed in strong-polarity nonprotic organic solvent, then diamine and dianhydride are added to dispersing liquid, stirring and a reaction are conducted, and a polyamide acid composite adhesive solution is obtained; or while the layered nanoparticles are dispersed, the diamine and the dianhydride are placed into another container for preparing polyamide acid, then nanoparticle dispersing liquid and the polyamide acid are mixed, and the composite adhesive solution is obtained; finally, the composite adhesive solution is dehydrated, and the polyimide nanocomposite is obtained. According to the polyimide nanocomposite, polyimide molecular chains of the type contain naphthalene nucleuses which are good in planarity and high in rigidity, the prepared nanocomposite has excellent thermal stability and barrier performance in combination with the enhancement effect of the layered nanoparticles, and the polyimide nanocomposite and the preparation method and application of the polyimide nanocomposite can be widely applied to fields of high-performance packaging, electronic device packaging and the like.

The invention discloses a flexible luminous polyimide film, a preparation method and application thereof. The polyimide material of the present invention adopts aromatic diamine with strong electron-withdrawing structure 1,2,4-triazole and various dianhydrides as raw materials, reacts to obtain polyamic acid solution, and then imidizes and coats prepared. The flexible polyimide film of the present invention not only has high photoluminescent efficiency, but also has high glass transition temperature and thermal stability, excellent mechanical properties, etc., and is suitable for preparing photoluminescent products and flexible electroluminescent devices luminescent layer material.

The invention discloses a polyimide with photochromic performance and its preparation method and application. By adjusting the molecular structure of photochromic diamine monomer or photochromic dianhydride monomer, different color changes can be obtained , the target monomer can be copolymerized or homopolymerized with commercial diamine or dianhydride, and the obtained polyimide material has good thermal properties and solubility properties. The photochromic polyimide provided by the present invention has optical responses of different color changes, and has excellent solubility, high glass transition temperature and thermal stability, and the preparation process is simple and diverse, and the condition requirements are low, so Suitable for industrial production. The polyimide material of the invention can obtain a nanoscale thin film through a spin coating method, and is suitable for preparing photochromic glass films and optical information storage device materials.

The invention discloses a soluble polyimide film with a high refractive index, belonging to the technical field of high molecular materials. The soluble polyimide film mainly comprises polyimide and a sweet clover extract. The polyimide film disclosed by the invention has excellent resolvability and can be dissolved into conventional organic solvents such as N-methylpyrrolidone, dimethyl sulfoxide, N, N-dimethylacetamide, N, N-dimethylformamide, m-cresol, tetrahydrofuran and the like; due to the addition of the sweet clover extract, the refractive index of the material is increased, the light transmittance performance of the material is improved, and the material has relatively high glass transition temperature and thermal stability and excellent mechanical properties; meanwhile, the preparation process is simple and varied and low in condition requirement so as to be suitable for industrial production.

The invention discloses novel hyperbranched polyimide containing a carbazole structure, and a preparation method and application of the novel hyperbranched polyimide. The novel hyperbranched polyimide is prepared by taking triamine containing the carbazole structure and all kinds of tetracid dianhydride as raw materials through imidization. The novel hyperbranched polyimide disclosed by the invention has higher glass-transition temperature, higher thermal stability, better optical performance and good solubility. A synthetic method disclosed by the invention is simple in technology and diversified, so that the synthetic method is suitable for industrial production. The novel hyperbranched polyimide disclosed by the invention has a better application prospect in the fields of photosensitization, optical waveguide, gas permeation and separation membranes and the like.

The invention discloses a hyperbranched polyimide containing a benzothiazole structure and a preparation method and application thereof. The hyperbranched polyimide material is prepared through imidization with triamine containing a benzothiazole structure and various tetracarboxylic dianhydrides as raw materials. The hyperbranched polyimide has high glass transition temperature and heat stability, good optical performance and good solubility. The synthesis method is simple and diverse in technology, thereby being suitable for industrial production. The hyperbranched polyimide has good application prospects in the field of high temperature resistance and the fields of photosensitive materials, optical waveguides and gas permeation separation membranes.

The invention discloses a hyperbranched polyimide with a phenanthrene ring-containing structure, a preparation method and an application thereof. Such a hyperbranched polyimide material is prepared through the imidization of raw materials, including triamine with the phenanthrene ring-containing structure and various tetracid dihydrides. Such a hyperbranched polyimide has higher glass-transition temperature and heat stability, lower thermal expansivity and excellent solubleness. The synthetic method disclosed by the invention has simple and various processes, so that the method is suitable forindustrial production. The hyperbranched polyimide disclosed by the invention has an excellent application prospect in the field of high temperature resistance and the field of materials, such as photosensitive, optical waveguide and gas permeation separating membranes.